Cylinder motion for double cylinder jacquards



Nov. 18, 1941.

H. V. FOSTER CYLINDER MOTION FOR DOUBLE CYLINDER JACQUARDS Original Filed June 5, 1939 2 Sheets-Sheet l h@ HU I nverltor' Herbert V. Foster Lw it Attornev Nav. 18, 1941., H, v FOSTER N 2,263,238

, CYLINDER MOTION FOR DOUBLE CYLINDER JACQUARDS Original Filed June 5, 1939 2 Sheets-Sheet 2 ci @P M j Inventor Lai Herb evt, V. Foster @jl/7 zur m 6 Attorney Patented Nov.` 18, 1941' CYLINDER MOTION EOR DOUBLE CYLINDER JACQUARDS Herbert'V. Foster, Providence, R. I., assignor to Crompton & Knowles Jacquard & Supply Company, Pawtucket, R. I

chusetts a corporation of Massa- Original application June 5, 1939, Serial No.

277,486; Divided and this application September 7, 1940, Serial No. 355,837

. s Claims. yicl. 139-329) This is a division of my co-pending `application Serial No. 277,486, filed June 5,1939.

This invention relates to improvements in jacquards and it is the general object of the invention to provide an improved driving mechanism E for the cylinders of double cylinder jacquards which will reduce wear on the needles, jacks, griff blades and cards while retaining the high speed characteristics of a double cylinder motion.

In double cylinder jacquards it has heretofore been customary to drive the cylinders `by socalled S-cams which are connected to the vertically reciprocating knives or griffs. The cams have straight portions to produce dwells in the cylinder motion when the griffs are near the top or bottom extremes of their vertical motion, but the intermediate part of the cam has been inclined in a direction to cause the cylinder to move awayfrom the needles `when the corre-v spondingknives are rising and movetoward the needles when the griff descends. Since both the cylinder and knives are connected to and driven from the same source of power the cylinder motion has been in phase with the knife motion.

Because of the identity of phase between the knife and cylinder motions the cylinder will be in a particular position for any given position of the knife whether the latter is rising or falling and since the cylinder must be pressed against the needles until after the knife has risen above the jacks to prevent all the jacks from being lifted the cylinder will be in the same position during the descent of the knife and will push the jacks off the knife while the jacks are still supported by the knife. Because of this early action of the cylinder the knives, jacks, needles and cards are subject to objectionable wear.

It is desirable that the cylinder continue to assert control of the jacks until the knives rise above the latter but it vis undesirable to have the cylinder assume control of the jacks atthe early time above specified and the objectionable wear mentioned would be avoided if the motion of the cylinder toward the needles could be delayed until the jacks in engagement with the knife reach their lowest position and become disengaged from the knife. In a double cylinder jacquard it is desirable that the condition just described exist for both cylinders and it is a further object of my present invention to provide a drive for the cylinders which will give each of the latter a motionout of phase with the knife motion so that in the 4descent of the knife the incoming cylinder will be late in asserting control of the jacks and immediately thereafter on the ascent of the knife will be late to release control of the jacks.

In the type of jacquard to which my inven-` tion relates one set of knives will rise on one pick and another set will rise on the following pick, this condition being brought about by using a two-pick double crank driven prefer ably from the bottom shaft of the loom.` `It is a further object of my present invention `to use an'additional crank also having a two-pick time and driven from `the bottom shaft but' spaced angularly fromthe cranks for the knives to effect a phase displacement between the cylinder and knife motion. By coupling the*` two cylinders together so that they reciprocate `in unison and driving them from the additional crank, the late movementof one cylinder motion away from its needles will coincide with ailate I approach of the other cylinder toward its need1es,the late timing for both cylinders being effected by the phase displacement already described so that the advantages of reduced wearing will accrue `to the benefit of the parts controlled by both cylinders as well as the knives.

With these and other objects in view which will appear as the description proceeds, mIy' invention resides in the combination and `arrangement of parts hereinafter described 'and v set forth.`

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth:

Fig. 1 is a front elevation of a jacquard together with its driving connections with the bottom shaft of the loom, y

Fig. 2v is a detail end elevation looking in the direction of arrow 2, Fig. 1.

Fig. 3 is a front elevation on an enlarged scale of the connection between the supporting and driving `rods for the two cylinders,

Fig. 4 is a vertical section on line 4-4 of Fig. 3, and

Figs. 5 to 10 are diagrammatic views showing the parts in different positions.

Referring to the drawings, the loom frame I5 has `top and bottom shafts I6 and I1, respectively,

which are connected by a 2 to 1 gearing including a small top gear I8 on the shaft I6 meshing with'a lalrger bottom gear of double the number of teeth I9 secured to the bottom shaft I1. The shaft I6 has a complete revolution for each pick of the loom and by means of the gears I8 and I9 the bottom shaft I1 has a'complete revolution for every two picks of the loom, Shaft I'I is extended and carries a crank arm 26 driving a rod head 2| connected to an ascending rod 22. The latter is attached as at 23 to a lever 24 moving about a fixed pivot 25 and connected by a link 26 to a knife frame 21 supporting a series of lifter knives or griffs Kl.

Extending downwardly from the arm 26 is a second crank arm 30 to drive a second rod head 3| connected to an ascending rodY 32 pivoted as at 33 to another lever 34 swinging about a fixed pivot 35. The right end of lever 34 is attached by means lof a link 36 to a knife frame 31 provided with a series of knives K2. The crank arms 20 and 3U extend to opposite sides of the bottom shaft |1 and by this arrangement alternate the reciprocating vertical motions of knives KI and K2. As set forth in Fig. 1 crank arm 20 is in high position which corresponds. to a low position for the knives KI, while crank arm 30 is in low position and correspond to a high position for knives K2. It is to be understood that during the operation of the loom one set of knives will be rising while the other set falls, and the greater part of a pick will be available for the actual lifting of the warp threads not shown which are controlled by the ascending knife. In other Words, each set of knives requires two picks for a complete recprocation thereof and the sets alternate in their rising motions.

The jacquard frame F is provided with two cylinders Cl and C2 at the left and right hand sides,-respectively, as shown in Fig. 1. Cylinder Cll is mounted for rotation about the pivot 40 supported by a horizontal sliding rod 4| mounted in bearings 42 on the jacquard frame, and in a similar manner cylinder C2 is rotatable about a pivot 45 carried by the second sliding rod 46 mounted in slide bearings 41 on the jacquard frame. These cylinders CI and C2 are provided with pattern cards PI and P2, respectively, which lare fed inV known manner byV rotation of the cylinders.

The matter thus far described may be. substantially the same as that found in ordinary double cylinder jacquards.

In order to connect the cylinders together so that they may reciprocate in unison and atproperly spaced positions with respect to thev parts which they control, rod 4| has secured thereto a collar 56 by means of adjustable set screws 5|, while rod 46` has secured thereto a collar 53l by means of screws 54. The collars are adjustable longitudinally along their respectiverods and are caused to move together by a bolt 55 shown particularly in Fig. 4. 'I'his bolt may extend through a web 56 depending from the collar 5|! and is projected to the left of the latter as shown in Fig. 4 to receive a square block 51 pivoted on bolt 55 and retained by the head 58. The block is located in a slot 59 in an upstanding web 60 formed integral with the lower collar 53. By reason of the connection shown in Figs. 3 and 4 the two rods 4| and 46 are required to reciprocate in unison, the block 51 preventing any binding or cramping which might occur if the tWo rods are not exactly parallel.

In order to reciprocate the rods and the cylinders which they support I provide the crank arrn 30 with an additional crank arm 65 to which is pivoted a rod head 66 attached to an ascending rod 61 connected as at 68 toa cylinder operating lever 69. The latter has. a fixed pivot and has an upright arm 1| attached to a conabove the knife KI.

nector rod 12. 'I'he latter is pivoted as at 13 to a collar 14 secured adjustably on the rod 4|.

'I'he additional crank arm 65 is provided with an arcuate slot 19 in which is located stud 89 constitutingv the pivot for the rod head 66. By reason of the arcuate slot the position of the pivot 86 can be changed with respect to the oppositely disposed crank arms 20 and 30. By reference to Fig. 2 it will be seen that crank arms 26 and 30 have crank pins 8| and 82, respectively, through which force is transmitted to operate the knives KI and K2, respectively. The pivots 8| and 82 are diametrically opposite so that the knives KI reach their lowest position when the knives K2 reach their highest position and vice versa. It is desirable that this relationship Vexist so that the maximum shed may be formed in the loom to facilitate passage of the shuttle not shown.

The shaft I1 turns in the direction of arrow a, Fig. 2, and arrow b, Fig. l. The pivots 8| and 82 lie on a diameter passing through the axis of shaft |1, while the arm 615 supports the pivot 80 in a selected position which is angularly displaced from the aforesaid diameter. During the rotation of shaft I1 the pivot 8', and therefore the motion of the cylinders will be out of phase with respect to the crank motion of the knives K| and K2 derived from the pivots 8| and 82, respectively. This phase displacement may be varied by reason of the slot 19.

Figs. 5 and 6 show diagrammaticallythe relationship between the cylinder motions, knives, and the jacks. In Fig. 5 the knife KI is assumed to be near or in its lowestv position corresponding to the dwell caused by movement of crank pin 8i through a position vertically over shaft |1, while knife K2: is in or near high position because of the location of crank pin 82 under shaft l1. The

4jacquard has a stationary support S through which project the lower ends of jacks J and J2 corresponding to knives KI and K2, respectively. Jack J l is being held in the position shown in Fig. 5v by support Sv with its upper hooked end The support S is a common feature in jacquards and performs. its. usual function of supporting all of the jacks when their corresponding knives are in lowest. position and supporting those jacks which have been moved out of the path of the corresponding knife when the latter ascends. As shown in Fig. 5 the jack `Il has its. hooked end vertically over the knife KI` in full line position, a condition which would not exist if the previouslyl mentioned S. cams were used. This figure also. shows that the cylinder CI moves from: the full to the dotted line position to. move the hook JI out of the path of knife KI after the jacks J have descended to have supporting relation with the support. S.

In Fig. 5 it is assumed that the. cylinder C| assumes. control of the jacquard by moving from the full to the dotted line. position while knife KIv is descending,v while Fig. 6 shows the condition when the knife, is ascending,y theV cylinder Cl moved from the full to the dotted line position*I to relinquish control of jack J l after knife Kl has been raised to a position where it, cannotv engage the hooked end of saidjack. It is to be understood thatA there will be a plurality of jacks for each knife and that. theI jacks. will be controlled by the usual needles. Inorder to illustrate the invention 1 have chosen two needlesA Nl and N2 which control jacks JI and J2, respectively. In Figs. 7 to l0 I have shown diagrammatically and in more detail the, relationship betweenwtheI cylinders and the knives together with their driving cranksand the needles and jacks. f i f InFig. 7 crank pins 8| and 82` are in vertical alignment with 4shaft with pin 8| up and with crank pin 80 lagging behind pin 8| and not yet in its highest position. Knife KI `is therefore in lowest position while knifeK2 is in highest position.V 'Jack J is in lifting position with respect to knife KI but is destined to be moved out of lifting position at the call of the pattern on cylinder Cl, which has just engaged needle Nl in. its right handI movement.

In Fig'the cranks have moved so that. pin 80 ls` over shaft and-crank pin 8| has moved to the right of andi below its highest positiontherebylifting the knife Kl to a position fabove the hook. of jack J During `the initial part of the up stroke of knife KI the cylinder CI is moved to its extreme right position by arrival of crank pin 80 directly over shaft and assuming a blank-on the pattern card jackJ will be moved by its needle N| out of `the path of knife KI. Subsequent to the vposition of Fig. 8` cylinder C| can safelyxrelinquish control of jack J since it can no longer be raised by knife KI, and the cylinder CI will start to move to the left as crank pin 80 starts to the right and downwardly from the position shown in Fig. 8. The two relations described in connection with Figs. 7 and 8 occur on one beat or pick of the loom, namely, that which is controlled by cylinder C|.

Figs. 9 and 10 show the controls for the next pick the pattern of which is determined by cylinder C2. In Fig. 9 it is assumed that the parts have moved so that crank pin 8| is vertically under shaft while crank pin 82 is over it and the cylinder driving crank pin 80 is not yetin its lowest position. Under these conditions cylinder C| has moved to a position close to the limit of its out motion where the cylinder will be given a quarter turn by mechanism not shown but well understood. During this time cylinder C2 has been moving to the left in unison with cylinder CI and with the parts in the position shown in Fig. 9 cylinder C2 has just engaged needleN2 which controls jack J 2 capable of being lifted by knife K2, the latter being down. Since crank pin 8| is in lowest position in Fig. 9 any further rotation in the direction of the arrow `will start knife K2 on its up stroke.

Continued rotation of shaft moves the crank pins to the position shown in Fig. 10 where the cylinder C2 has reached its inmost position because of the fact that crank pin 80 is now directly under shaft I'l. Knife K2 has risen to 4a point slightly above the top of jack J2 and control of needle N2 can therefore be relinquished by cylinder C2 without causing a mis-pick. As shaft rotates in a clockwise direction beyond the position shown in Fig. 10 the crank pin 80 Will start to rise and move cylinder C2 to the right away from needle N2.

From the showing in connection with Figs. 7 to 10 it is evident that the phase displacement between the cylinder and the knives exists for both cylinder CI and C2. It is to be understood of course that if the pattern requires certain of the jacks to be lifted by their knives they will not be moved as described in connection with Figs. '7 to 10. Since the timing of the jacquard is important with respect to the jacks which must clear the knives both on their down strokes and on the up stroke immediately following, the

detaileddescription has been given for this condition.'

.It should be noted` thatthe late approach of cylinder 1C| to a position corresponding to that of Fig. 8 is accompanied by the simultaneous movement of the cylinder C2 in its late movement away from needle controlling position. In otherwords cylinder C| must be late to assert control overfneedle NI and cylinder C2 must be late toV relinquish'control of needle N2 relatively to the knife motion. These two timings are assured as set forth herein Vby causing the cylinders to move in unison, one cylinder to assumeand the other to relinquish needle controly when the cylinders move in one direction, and the other cylinder to assume while the rst cylinder relinquishes control of the Aneedle when the cylinders move in the opposite direction. In both of these motions the same phase displacement exists and is effected by the single crank pin 8|] because of `its angular relation with respect to the crank pins 8| and 82.

From the foregoing it will be seen that I have provided a'double` cylinder jacquard wherein the cylinders are given a motion which is late with respect to the knife motions to the end that the incoming cylinder will not assert control over a jack vstill in engagement with a descending knife until the latter has moved below jack engaging position, and this timing is followed on the next up stroke of the knife by a corresponding late relinquishment of needle control by the cylinder delayed until the knife has reached a point in its4 upward travel where it can no longer engage a released jack. It will be seen t that this result is accomplished by means of a single crank operatively connected to both cylinders to cause the latter to move in unison and with the crank causing the cylinders to reach the extremes of their reciprocating motions at a time out of phase with and later than the corresponding movements of the knives to their extreme position. This relationship exists for each cylinder and the cylinders are so related that when either moves to assume control of the needles by a time late with respect to the corresponding knives the other cylinder will move by a motion which is also late with respect to its knives to relinquish control of the needles. It will further be seen that the advantages set forth herein depend upon the fact that the crank which drives the cylinders requires two beats of the loom for its revolution, this fact maintaining the proper relationship between the cylinders and the knives for all picks of the loom. `Double cylinder jacquards have the advantage of being able to operate at high rates of speed inasmuch as each cylinder has two picks in which to leave and return to needle controlling position, and this advantage is retained by the type of cylinder drive described hereinbefore.

The use of a crank to drive the two cylinders C and C2 is not claimed herein but is made the,

nected to and oscillated by the crank, connecting mechanism for the cylinders comprising two spaced substantially parallel bars, one for' each cylinder, said connecting mechanism including meansto connect the barsv to cause the latter to move in unison and' cause the cylinders to reciprocate in unison and require one cylinder to move away' from the. set of needles corresponding thereto while the other cylinder is moving toward the set of needles corresponding to said other cylinder, means to guide the bars, and means to connect the oscillating lever to the connecting mechanism so thatl oscillation of the lever Will cause reciprocation of the cylinders.

2. In a jacquard mechanism having two separate sets of warp jack controlling needlesand having a cylinder for each set of needles, that improvement in driving mechanism for the cylinders comprising a rotating crank, a lever connected to the crank to be oscillated by the latter, a pair of substantially parallel slide bars, one bar for each cylinder, means to guide the bars, means to connect the bars to cause the same to move in unison so that when one cylinder approaches the set of needles corresponding thereto the other cylinder will move away from the set of needles corresponding to said other cylinder, and means to connect the oscillating lever to one of the bars so that oscillation of the lever Will effect the reciprocation of the cylinders.

3. In a jacquard mechanism having two separate sets of warp jack controlling needles and having a cylinder for each set of needles, that improvement in' driving mechanism for the cylinders comprising a rotating crank, a lever connected to the crank and oscillated by the latter, a pair of substantially parallel bars, one connected to each cylinder, guides for the bars, a pair of' connecting elements one carried by each bar, the elementsA to have driving relation with respect to each other in a direction substantially parallel to the bars and capable of relative angular movement with respect to each other, and means to connect the oscillating lever to one of the bars to elect reciprocation of the cylinders to move one cylinder toward the set of needles corresponding thereto and at the same time move the other cylinder away from the set of needles corresponding to said other cylinder.

HERBERT V. FOSTER. 

